The card to be forced is at the bottom of the deck. Hold the deck face down in the Hindu shuffle position in the left hand, i.e., hold the deck with the third phalanx of the fingers with the thumb on one long edge and the other four fingers on the... Read more of The Hindu Shuffle & Force at Card Trick.caInformational Site Network Informational
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Steel Making

S A E Heat Treatments
The Society of Automotive Engineers have adopted certain heat...

Standard Analysis
The selection of a standard analysis by the manufacturer is t...

Properties Of Alloy Steels
The following table shows the percentages of carbon, manganes...

Shrinking And Enlarging Work
Steel can be shrunk or enlarged by proper heating and cooling...

Quenching The Work
In some operations case-hardened work is quenched from the bo...

Effect Of A Small Amount Of Copper In Medium-carbon Steel
This shows the result of tests by C. R. Hayward and A. B. Joh...

Molybdenum steels have been made commercially for twenty-five...

A Chromium-cobalt Steel
The Latrobe Steel Company make a high-speed steel without tun...

Properties Of Steel
Steels are known by certain tests. Early tests were more or l...

Highly Stressed Parts
The highly stressed parts on the Liberty engine consisted of ...

Drop Forging Dies
The kind of steel used in the die of course influences the he...

Heat Treatment Of Punches And Dies Shears Taps Etc
HEATING.--The degree to which tools of the above classes shou...

Chromium when alloyed with steel, has the characteristic func...

Steel Before The 1850's
In spite of a rapid increase in the use of machines and the ...

Heat Treatment Of Gear Blanks
This section is based on a paper read before the American Gea...

Blending The Compound
Essentially, this consists of the sturdy, power-driven separa...

Mushet And Bessemer
That Mushet was "used" by Ebbw Vale against Bessemer is, perh...

Refining The Grain
This is remedied by reheating the piece to a temperature slig...

Steel is hardened by quenching from above the upper critical....

Martien was probably never a serious contender for the honor ...

An Automatic Temperature Control Pyrometer


Automatic temperature control instruments are similar to the Brown
indicating high resistance pyrometer with the exception that the
pointer is depressed at intervals of every 10 sec. upon contact-making
devices. No current passes through the pointer which simply depresses
the upper contact device tipped with platinum, which in turn comes
in contact with the lower contact device, platinum-tipped, and the
circuit is completed through these two contacts. The current is very
small, about 1/10 amp., as it is only necessary to operate the relay
which in turn operates the switch or valve. A small motor is used to
depress the pointer at regular intervals. The contact-making device
is adjustable throughout the scale range of the instrument, and an
index pointer indicates the point on the instrument at which the
temperature is being controlled. The space between the two contacts
on the high and low side, separated by insulating material, is
equivalent to 1 per cent of the scale range. A control of temperature
is therefore possible within 1 per cent of the total scale range.
Figure 131 shows this attached to a small furnace.

Next: Pyrometers For Molten Metal

Previous: Brown Automatic Signaling Pyrometer

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